Improvement in saw-mills



ii'tiaitet .tant

@tutti @ittica Letters Patent N 103,952, dated June T, 1870.

'---v-wn-n-m IMPROVEMENT IN SAW-MILLS.

The Schedule referred to in these Letters Patent and making part of thesame.

To whom it may concern.'

Be it knouhr that I, WILLIAM M. WILKIN, of Detroit, in the county of'ayne and State of Michigan, have invented a new and useful Improvementin Mulcy-saw Hangings; and I do declare that the following is a true andaccurate description thereof, reference being had to the accompanyingdrawing, and to the letters of reference marked thereon'and being a partof this specification, in which- Figure l is a front elevation oi' apair of mnley saws hung in my improved hangings, and operated by onepitman as a gang l Figure 2 is a side elevation ofthe saine, showing themethod of attaching the saws to the pitnian by my improved doublebuckle;

Figure 3 is aplan of my double muley guides;

Figure 4 is a side elevation of the lower end of a muley saw, showingthe method of attaching my double yokes thereto; and Y Figure 5 isadiagram showing the advantage of employing two or three mnley saws insiding up a 4log ready for the gang.

Similar letters of reference indicate corresponding parts in eachfigure.

The nature of this invention relates to an improved method of hangingand operating mnley saws, and consists-` l First, in the novelconstruction of the guide-yokcs;

Second, in the arrangement of the double-forked buckles, connected by across-piece, showing a rectangular transverse bar and certain hookedyokes secured to the lower end of muley saws; and

- Third,in the arrangement of the saws, straps, yokes, and keys by whichthe saws are connected to the/transverse arm of' the saw-buckles, all asmore fully described below.

slot cut therein. These slots are in the form of hooks,

which embrace the saw and straps'which are half dovetailed to receivethem. rlhc yoke. is slipped over the cross-head, the saw is inserted inthe slots and then is secured in place by driving a key, c, through theslots in each arm ofthe yoke, under the squared part ofthe cross-headand over the upper edge of the saw and its straps, as shown in tig. 2.

The body ot' the cross-head is of such. length that two or more saws maybe secured thereto in the man ner described, and still perluit of thelateral adjustment of the saws to cut lumber of various thicknesses.

The .connection above described beingl of greater length from front torear of the saw, gives the latter greater rigidity and steadiness whenin motion than it would have weren single hook used for the purpose.

E'arc similar' yokes, two of which are attached to the lowerend of thesaw in the manner above described.

F is the pitman, the construction and arrangement of which, and itsattachment, are such that an oscillatory motion is comrmmicated to thesaws in their reciprocation. Any arrangement of the hangings to producethis result I do not claim as my invention, but design to show that mymethod of attaching the saws to the pitmau is applicable thereto,equally as well as to au ordinary rig or hanging.

The upper ends of the pitman-forks are provided with guides, whichreciprocate between the slides oi the lower mhley box.

dis the noddIe-pin,journaled in the lower the fork.

.G are two-forked buckles, between the ends of whose forks is arectangular transverse bar, e, on which the lower edge of' the sawrests, the yokes E embracing both, and are secured in position by keysand gibs f f.

The two buckles are, rigidly held together by`a-long itudinal bar orcross-piece, g, which forms-a yoke withtheir lower ends. This yokeembraces the noddlefpiu d, whose body is squared as shown, when thebuckles are connected to the pitmau by driving a key, h, through a slotin the tail of each buckle under the ncddle-pin.

,II are the mulcy guides, which are adjusted on the jaws I in the usualway.

J are guide-yokes, which are also adjustably secured to the jaws I.rlhcir straight baies or edges pass between the saws, where oneoverlaps. the other, as shown.

As cach saw wouhl he guided only on its outer face by the blocks II, onthe inner faces ofthe straight parts of the yokes J I place. Vnue ormore guides or spots, which consist oi' one or umrc'thicknesses ot'raw-hide, leather, or other suitable material, secured thereto by one ormore copper rivets. Owing to their small size when reduced to scale indrawings, these spots are `not shown. y v` B v the above-describedarrangement or' guides, the saws arc prevented from diverging from. aright line in either direction.

1t will readily be perceived that the saws maybe adjusted in theirhangings, and their guides to them, so that lumber of variousthicknesses maybe sawn.

Three or more saws may he hung in like manner part of 'frame secured tot-he jaws I, and movable guides se,

Vin said frame or in any other convenient manner.

cut, rig back, reset and take a second eut, to save ment of the doubleyokesE for connecting them in which case the guide-yokes-J are replacedby acured thereto between the saws, either through slots In'tig. 5isshown one of the advantages of employing two or three saws in themanner described. InI siding up a log to prepare it for the gang, wheretwo of my saws are used in one hanging, instead of taking o' a thicksla-b, to go to waste, or to make a board, I make but one cut, and withthree saws I talee off a smaller slab and two merchantable boards, asshown in the diagram.

' Not only is this arrangementof the saws applicable to the purposejustl described, but is of equal value in stocking up, doubling, ortrebling thcproduotof a set of mnley hangings, with but a tritiingaddition to its first cost, and with asmall additional expenditure of'power :is-.compared with a single muley saw.

A single saw may be run inthe same hangings, by removing the guide-jokesJ from the muley guides and adjust-ing the guPe-blocks; H'. l

This method of co1 iecting the saws to the pitmau permits of their ready,djust-m'ent, and, by the employ-v thereto, great rigidity is secured tothe saws while cutting.

I am well aware that several saws, hung in a gate or. sash, andreeiprocated by aI single pitman,vare not new, and while,V I expresslydisclaim vthe invent-ion of What I do claim as my invention, and desiret0 Secure by Letters Patent, is-

1. 'Ihe guide-yokes J, constructed, arranged, and operatingsubstantially as andiorl the purposeA setl forth.

2. The double-forked buckles G, connectedl by the purpose setforth. p

WM. M. WILKIN.

' Witnesses:

